Готові списки джерел за темами / Ag-MOF

Добірка наукової літератури з теми "Ag-MOF"

Автор: Grafiati

Опубліковано: 14 березня 2023

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Статті в журналах з теми "Ag-MOF"

Alduhaish, Osamah M., Mohammed Rafi Shaik, and Syed Farooq Adil. "Photo-Induced Preparation of Ag@MOF-801 Composite Based Heterogeneous Nanocatalyst for the Production of Biodiesel." Catalysts 12, no. 5 (May 11, 2022): 533. http://dx.doi.org/10.3390/catal12050533.

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Hybrid materials based on metal-organic frameworks (MOFs) and nanoparticles (NPs) have gained considerable popularity in a variety of applications. Particularly, these types of materials have demonstrated excellent efficiency in heterogeneous catalysis due to the synergistic effect between the components. Herein, we report a simple, eco-friendly, photocatalytic method for the fabrication of Zr containing MOF-801 and a silver (Ag) NPs-based hybrid (Ag@MOF-801). In this method, the photocatalytic property of the central metal ion (Zr) of MOF was exploited to promote the formation and deposition of Ag NPs on the surface of the MOF-801 under the irradiation of visible light. The successful incorporation of Ag NPs was ascertained by powder X-ray diffraction (XRD) and UV-Vis analysis, while the morphology and surface area of the sample was determined by N2 adsorption–desorption and scanning electron microscopy (SEM), respectively. The resulting Ag@MOF-801 hybrid served as a highly efficient catalyst for the transesterification of used vegetable oil (UVO) for the production of biodiesel. The Ag@MOF-801 catalyst exhibited superior catalytic activity compared to its pristine MOF-801 counterpart due to the enhanced surface area of the material.

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Zhang, Meng, Guohui Wang, Xin Zhang, Yuqi Zheng, Shaoxiang Lee, Dong Wang, and Yang Yang. "Polyvinyl Alcohol/Chitosan and Polyvinyl Alcohol/Ag@MOF Bilayer Hydrogel for Tissue Engineering Applications." Polymers 13, no. 18 (September 17, 2021): 3151. http://dx.doi.org/10.3390/polym13183151.

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In this paper, polyvinyl alcohol/Ag-Metal-organic framework (PVA/Ag@MOF) and polyvinyl alcohol/chitosan (PVA/CS) were used as the inner and outer layers to successfully prepare a bilayer composite hydrogel for tissue engineering scaffold. The performance of bilayer hydrogels was evaluated. The outer layer (PVA/CS) has a uniform pore size distribution, good water retention, biocompatibility and cell adhesion ability. The inner layer (PVA/Ag@MOF) has good antibacterial activity and poor biocompatibility. PVA, PVA/0.1%Ag@MOF, PVA/0.5%Ag@MOF, and PVA/1.0%Ag@MOF show anti-microbial activity in ascending order. However, its use as an inner layer avoids direct contact with cells and prevents infection. The cell viability of all samples was above 90%, indicating that the bilayer hydrogel was non-toxic to A549 cells. The bilayer hydrogel scaffold combines the advantages of the inner and outer layers. In summary, this new bilayer composite is an ideal lung scaffold for tissue engineering.

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Seo, Hwawon, Inwon Lee, Sridhar Vadahanambi, and Hyun Park. "Metal-Organic Framework Reinforced Acrylic Polymer Marine Coatings." Materials 15, no. 1 (December 21, 2021): 27. http://dx.doi.org/10.3390/ma15010027.

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Анотація:

Metal-organic frameworks (MOFs), a class of crystalline, porous, 3D materials synthesized by the linking of metal nodes and organic linkers are rapidly emerging as attractive materials in gas storage, electrodes in batteries, super-capacitors, sensors, water treatment, and medicine etc. However the utility of MOFs in coatings, especially in marine coatings, has not been thoroughly investigated. In this manuscript we report the first study on silver MOF (Ag-MOF) functionalized acrylic polymers for marine coatings. A simple and rapid microwave technique was used to synthesize a two-dimensional platelet structured Ag-MOF. Field tests on the MOF reinforced marine coatings exhibited an antifouling performance, which can be attributed to the inhibition of marine organisms to settle as evidenced by the anti-bacterial activity of Ag-MOFs. Our results indicate that MOF based coatings are highly promising candidates for marine coatings.

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Xu, Wentao, Huaqiang Zhuang, Zehai Xu, Mianli Huang, Shangchan Gao, Qingbiao Li, and Guoliang Zhang. "Design and Construction of Ag@MOFs Immobilized PVDF Ultrafiltration Membranes with Anti-bacterial and Antifouling Properties." Advances in Polymer Technology 2020 (January 3, 2020): 1–11. http://dx.doi.org/10.1155/2020/5456707.

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In this work, Ag nanoparticle loading Mg(C10H16O4)2(H2O)2(Ag@MOF) composite material was successfully prepared by a facile strategy, and subsequently Ag-MOFs were used to modify the PVDF ultrafiltration membranes to obtain fouling resistance and higher water flux. The as-prepared PVDF membranes were systematically characterized by a series of analytical techniques such as Water Contact Angle (CA), Scanning Electron Microscopy (SEM), and SEM-mapping. Furthermore, the performance of membranes on antibacterial properties, the pure water flux, and fouling resistance was investigated in detail. Those results showed that the membrane modified by Ag@MOFs containing 30% Ag had the higher anti-bacterial performance, and the clear zone could be increased to 10 mm in comparison with that of blank membrane. Meanwhile, the pure water flux of Ag@MOF membranes increased from 85 L/m2 h to 157 L/m2 h, and the maximum membrane flux recovery rate (FRR) of 95.7% was obtained using SA as pollutant, which is attributed to the introduction of Ag@MOF composite material. Based on the above experimental results, it can be found that the Ag-MOF membranes displayed the excellent antibacterial activity, high water flux, and fine fouling resistance. This work provides a facile strategy to fabricate the Ag@MOFs modified membranes, and it shows an excellent anti-bacterial and water flux performance.

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Li, Bo, Yu-Ying Jiang, Ya-Ya Sun, Yan-Jiang Wang, Min-Le Han, Ya-Pan Wu, Lu-Fang Ma, and Dong-Sheng Li. "The highly selective detecting of antibiotics and support of noble metal catalysts by a multifunctional Eu-MOF." Dalton Transactions 49, no. 42 (2020): 14854–62. http://dx.doi.org/10.1039/d0dt03176c.

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A new porous MOF, Eu-MOF, can serve as a turn-off sensor for detection of ornidazole /nitrofurantoin antibiotics at different excitation wavelength. Additionally, Ag_xAu_1−x@Eu-MOF composite can remarkably catalyze the reduction of nitrophenol.

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Gupta, Nishesh Kumar, Jiyeol Bae, and Kwang-Soo Kim. "Role of Bimetallic Solutions in the Growth and Functionality of Cu-BTC Metal–Organic Framework." Materials 15, no. 8 (April 11, 2022): 2804. http://dx.doi.org/10.3390/ma15082804.

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Bimetallic solutions play a vital role in the growth and functionality of copper trimesate (Cu-BTC) metal–organic frameworks (MOFs). The effect of Ag+, Ca2+, Mn2+, Co2+, and Zn2+ on the growth of Cu-BTC was studied by fabricating M-Cu-BTC MOFs at room temperature using bimetallic M-Cu solutions. While Ag+ in the MOF had a rod-like morphology and surface properties, divalent cations deteriorated it. Moreover, unconventional Cu+ presence in the MOF formed a new building unit, which was confirmed in all the MOFs. Apart from Ag and Mn, no other MOF showed any presence of secondary cations in the structure. While Ag-Cu-BTC showed an improved H2S uptake capacity, other M-Cu-BTC MOFs had superior organic pollutant adsorption behavior. Thus, we have demonstrated that the physicochemical properties of Cu-BTC could be modified by growing it in bimetallic solutions.

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El-Yazeed, W. S. Abo, and Awad I. Ahmed. "Monometallic and bimetallic Cu–Ag MOF/MCM-41 composites: structural characterization and catalytic activity." RSC Advances 9, no. 33 (2019): 18803–13. http://dx.doi.org/10.1039/c9ra03310f.

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Li, Xi, Huiying Zheng, Jiehan Chen, Mengyuan Xu, Yan Bai, and Tiantian Liu. "MIL-101 (Fe) @Ag Rapid Synergistic Antimicrobial and Biosafety Evaluation of Nanomaterials." Molecules 27, no. 11 (May 29, 2022): 3497. http://dx.doi.org/10.3390/molecules27113497.

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Анотація:

Metal-organic frameworks (MOFs), which have become popular in recent years as excellent carriers of drugs and biomimetic materials, have provided new research ideas for fighting pathogenic bacterial infections. Although various antimicrobial metal ions can be added to MOFs with physical methods, such as impregnation, to inhibit bacterial multiplication, this is inefficient and has many problems, such as an uneven distribution of antimicrobial ions in the MOF and the need for the simultaneous addition of large doses of metal ions. Here, we report on the use of MIL-101(Fe)@Ag with efficient metal-ion release and strong antimicrobial efficiency for co-sterilization. Fe-based MIL-101(Fe) was synthesized, and then Ag+ was uniformly introduced into the MOF by the substitution of Ag+ for Fe3+. Scanning electron microscopy, powder X-ray diffraction (PXRD) Fourier transform infrared spectroscopy, and thermogravimetric analysis were used to investigate the synthesized MIL-101(Fe)@Ag. The characteristic peaks of MIL-101(Fe) and silver ions could be clearly seen in the PXRD pattern. Comparing the diffraction peaks of the simulated PXRD patterns clearly showed that MIL-101(Fe) was successfully constructed and silver ions were successfully loaded into MIL-101(Fe) to synthesize an MOF with a bimetallic structure, that is, the target product MIL-101(Fe)@Ag. The antibacterial mechanism of the MOF material was also investigated. MIL-101(Fe)@Ag exhibited low cytotoxicity, so it has potential applications in the biological field. Overall, MIL-101(Fe)@Ag is an easily fabricated structurally engineered nanocomposite with broad-spectrum bactericidal activity.

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Zhang, Jun, Shanli Yang, Lang Shao, Yiming Ren, Jiaolai Jiang, Huaisheng Wang, Hao Tang, Hui Deng, and Tifeng Xia. "Highly Sensitive Adsorption and Detection of Iodide in Aqueous Solution by a Post-Synthesized Zirconium-Organic Framework." Molecules 27, no. 23 (December 4, 2022): 8547. http://dx.doi.org/10.3390/molecules27238547.

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Effective methods of detection and removal of iodide ions (I−) from radioactive wastewater are urgently needed and developing them remains a great challenge. In this work, an Ag+ decorated stable nano-MOF UiO-66-(COOH)2 was developed for the I− to simultaneously capture and sense in aqueous solution. Due to the uncoordinated carboxylate groups on the UiO-66-(COOH)2 framework, Ag+ was successfully incorporated into the MOF and enhanced the intrinsic fluorescence of MOF. After adding iodide ions, Ag+ would be produced, following the formation of AgI. As a result, Ag+@UiO-66-(COOH)2 can be utilized for the removal of I− in aqueous solution, even in the presence of other common ionic ions (NO2−, NO3−, F−, SO42−). The removal capacity as high as 235.5 mg/g was calculated by Langmuir model; moreover, the fluorescence of Ag+@UiO-66-(COOH)2 gradually decreases with the deposition of AgI, which can be quantitatively depicted by a linear equation. The limit of detection toward I− is calculated to be 0.58 ppm.

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Wang, Xin Rui, Jing Du, Zhuo Huang, Kun Liu, Yuan Yuan Liu, Jian Zhong Huo, Zhong Yi Liu, Xiao Yu Dong, Li Li Chen, and Bin Ding. "Anion directing self-assembly of 2D and 3D water-stable silver(i) cation metal organic frameworks and their applications in real-time discriminating cysteine and DNA detection." Journal of Materials Chemistry B 6, no. 28 (2018): 4569–74. http://dx.doi.org/10.1039/c8tb01032c.

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Two water-stable silver(i) cation metal organic frameworks (MOFs), namely 2D MOF {[Ag(L)₂]BF₄}_n (1) and 3D MOF {[Ag₃(L)₃]·(H₂O)·(CF₃SO₃)₃}_n (2) (L = 1-(4-aminobenzyl)-1,2,4-triazole), have been prepared.

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